9638082840 has 128 divisors (see below), whose sum is σ = 30535626240. Its totient is φ = 2428732416.

The previous prime is 9638082821. The next prime is 9638082841. The reversal of 9638082840 is 482808369.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 9638082840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9638082841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208044 + ... + 250116.

It is an arithmetic number, because the mean of its divisors is an integer number (238559580).

Almost surely, 2^9638082840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9638082840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15267813120).

9638082840 is an abundant number, since it is smaller than the sum of its proper divisors (20897543400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9638082840 is a wasteful number, since it uses less digits than its factorization.

9638082840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42193 (or 42189 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The square root of 9638082840 is about 98173.7380361978. The cubic root of 9638082840 is about 2128.1237814773.

The spelling of 9638082840 in words is "nine billion, six hundred thirty-eight million, eighty-two thousand, eight hundred forty".